1217481 has 4 divisors (see below), whose sum is σ = 1623312. Its totient is φ = 811652.

The previous prime is 1217477. The next prime is 1217483. The reversal of 1217481 is 1847121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1217481 - 2² = 1217477 is a prime.

It is a super-2 number, since 2×1217481² = 2964519970722, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

1217481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1217483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202911 + ... + 202916.

It is an arithmetic number, because the mean of its divisors is an integer number (405828).

2^1217481 is an apocalyptic number.

It is an amenable number.

1217481 is a deficient number, since it is larger than the sum of its proper divisors (405831).

1217481 is an equidigital number, since it uses as much as digits as its factorization.

1217481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405830.

The product of its digits is 448, while the sum is 24.

The square root of 1217481 is about 1103.3952147803. The cubic root of 1217481 is about 106.7793806369.

The spelling of 1217481 in words is "one million, two hundred seventeen thousand, four hundred eighty-one".